io.micronaut.crac.resources.datasources.resolver.HikariDelegatingDataSourceResolver Maven / Gradle / Ivy

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Adds support for CRaC (Coordinated Restore at Checkpoint) to the Micronaut Framework.

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/*
 * Copyright 2017-2023 original authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.micronaut.crac.resources.datasources.resolver;

import com.zaxxer.hikari.HikariDataSource;
import io.micronaut.context.annotation.Requires;
import io.micronaut.core.annotation.Experimental;
import io.micronaut.core.annotation.NonNull;
import io.micronaut.crac.CracConfiguration;
import io.micronaut.data.connection.jdbc.advice.DelegatingDataSource;
import jakarta.inject.Singleton;
import org.crac.Resource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.sql.DataSource;
import java.util.Optional;

/**
 * If the data Source is of type {@link io.micronaut.data.connection.jdbc.advice.DelegatingDataSource}, extract the underlying data source.
 *
 * @author Sergio del Amo
 * @since 1.2.0
 */
@Singleton
@Experimental
@Requires(classes = { DelegatingDataSource.class, HikariDataSource.class })
public class HikariDelegatingDataSourceResolver implements DataSourceResourceResolver {

    static final int ORDER = 1;

    private static final Logger LOG = LoggerFactory.getLogger(HikariDelegatingDataSourceResolver.class);

    @Override
    @NonNull
    public Optional resolve(@NonNull DataSource dataSource, @NonNull CracConfiguration configuration) {
        if (dataSource instanceof DelegatingDataSource) {
            if (LOG.isDebugEnabled()) {
                LOG.debug("DelegatingDataSource detected, unwrapping");
            }
            DataSource result = DelegatingDataSource.unwrapDataSource(dataSource);
            if (LOG.isDebugEnabled()) {
                LOG.debug("Unwrapped DataSource is {}", result.getClass().getName());
            }
            return HikariDataSourceResolver.resourceForNonDelegatingDataSource(result, configuration);
        }
        return Optional.empty();
    }

    @Override
    public int getOrder() {
        return ORDER;
    }
}